VNC

Do the following to install x11vnc which will allow you to VNC into a “headless” (no monitor, keyboard, or mouse connected) Pi from an external machine.

sudo apt-get install x11vnc

sudo tee /etc/init.d/x11vnc <<EOF
#!/bin/bash
# /etc/init.d/x11vnc
# Carry out specific functions when asked to by the system
case "$1" in
  start)
    su pi -c '/usr/bin/x11vnc -forever -display :0'
    echo "Starting VNC server "
    ;;
  stop)
    pkill x11vnc
    echo "VNC Server has been stopped (didn't double check though)"
    ;;
  *)
    echo "Usage: /etc/init.d/x11vnc {start|stop}"
    exit 1
    ;;
esac
exit 0
EOF
sudo chmod 755 /etc/init.d/x11vnc
sudo update-rc.d x11vnc defaults